A8304: Single LNB Supply and Control Voltage Regulator

The A8304 is a single channel low noise block regulator
(LNBR). The A8304 consists of a monolithic boost converter
followed by a low-drop linear regulator. It is specifically
designed to provide the power and the interface signals to an
LNB down converter via coaxial cable in satellite TV receiver
systems.

The A8304 requires few external components, with the boost
switch and compensation circuitry integrated inside of the
device. The 704 kHz switching frequency and user-controlled
output current limit minimize the size of the passive filtering
components.

The I2C™-compatible interface provides control capabilities for
complex system requirements, as well as diagnostic capabilities
for system fault reporting.

A sleep pin is available to maximize power savings and to
quickly shut down the device if needed, without using I2C™
control.

The A8304 is provided in a small 3 × 3 mm QFN package with
exposed pad for thermal dissipation. It is lead (Pb) free, with
100% matte tin leadframe plating.

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.